Safety Pin

ABSTRACT

A safety pin is provided and which comprises a cylinder having a first port and a second port arranged in longitudinal ends. A piston is moveably disposed within the cylinder and dividing the cylinder into a first chamber in communication with the first port and a second chamber in communication with the second port. A dowel pin is securely attached to the piston. An adjusting device regulates the position of the piston along a position perpendicular to the first and second directions. And a supplying device directing compressed air to the first chamber through the first port, or directing the compressed air to the second chamber through the second port so as to push the piston and the dowel pin to move along the first direction so as for performing locking and unlocking the equipment. By this arrangement, equipment can be readily locked up and unlocked by the provision of the safety pin.

FIELD OF THE INVENTION

The present invention relates to a safety pin, and more particularly, toa safety pin which can be manipulated automatically by means of adriving device.

DESCRIPTION OF PRIOR ART

For those heavy equipment locked merely by a servo are really dangerousto those maintenance personnel if the equipment do not incorporated adeadbolt or safety pin in additional to the servo. There are plenty ofmoving parts within the heavy equipment, and during this revolving andtransporting, it is mandatory to have a safety pin deadbolted to thosemoving or revolving parts so as to ensure a safety environment for theworking personnel to perform the maintenance, repairs, and inspection.This is extremely important to the safety of those maintenance personnelso as to avoid any safety issues if those equipment are accidentlytriggered to operate or turned on with power.

However, any safety pin operated solely by human has a potential riskresulted from human negligence or risking personnel safety. For example,in some application, the safety pin is located at right under equipmentwhich is hanging over the working position in which the safety pin is toset.

Accordingly, it is necessary to provide a safety pin so as to resolvethe prior art issue.

SUMMARY OF THE INVENTION

It is the objective of the present invention to provide a safety pinwhich can be operated automatically and remotely without riskingpersonnel's safety.

In order to resolve the technical issue encountered by the prior art,the present invention provides a technical solution by introducing asafety pin which comprises a cylinder having a first port and a secondport arranged in longitudinal ends. A piston is moveably disposed withinthe cylinder and dividing the cylinder into a first chamber incommunication with the first port and a second chamber in communicationwith the second port. A dowel pin is securely attached to the piston. Anadjusting device regulates the position of the piston along a positionperpendicular to

1. A safety pin, comprising: a cylinder having a first port and a secondport arranged in longitudinal ends; a piston moveably disposed withinthe cylinder and dividing the cylinder into a first chamber incommunication with the first port and a second chamber in communicationwith the second port; a dowel pin securely attached to the piston; anadjusting device regulating the position of the piston along a positionperpendicular to the first and second directions, the adjusting deviceincluding a platform, a pulling device, a driving device and a guiderailsystem, wherein the cylinder is installed onto the platform, wherein thepulling device is interlinked to the platform and the driving device,wherein the position of the platform can be readily along the seconddirection by the driving device through the pulling device, wherein theguiderail system is arranged along the second direction, wherein theplatform is driven to move along the second direction along theguiderail system; and a supplying device directing compressed air to thefirst chamber through the first port, or directing the compressed air tothe second chamber through the second port so as to push the piston andthe dowel pin to move along the first direction so as for performinglocking and unlocking the equipment.
 2. The safety pin as recited inclaim 1, characterized in that the first direction is a horizontaldirection, and the second direction is a vertical direction.
 3. Thesafety pin as recited in claim 2, characterized in that the drivingdevice is a motor, and the pulling device is a cable.
 4. The safety pinas recited in claim 2, characterized in that the safety pin furthercomprises a switching valve installed on the platform, and whichincludes a third port in communication with the first port, and a fourthport in communication with the second port, an inlet and an outlet,wherein the inlet is interconnected to the supplying device, and theswitching valve selectively interconnect the third port and the forthport to the inlet and the outlet, respectively.
 5. The safety pin asrecited in claim 4, wherein the switching valve interconnects the thirdport to the inlet, and the fourth port to the outlet under the firstsituation, and interconnects the third port to the outlet and the fourthport to the inlet under the second situation.
 6. The safety pin asrecited in claim 5, characterized in that the pin further includes abracket to support the dowel pin, the safety pin projects out of thebracket under the first situation so as to lockup the equipment.
 7. Thesafety pin as recited in claim 6, wherein the safety pin retracts intoof the bracket under the second situation so as to unlock the equipment.8. The safety pin as recited in claim 7, wherein the bracket is definedwith a plurality of through holes along the second direction, whereinthe dowel pin moveably disposed within the thorough hole under the firstsituation, and the dowel pin is out of the hole under the secondsituation.
 9. A safety pin, comprising: a cylinder having a first portand a second port arranged in longitudinal ends; a piston moveablydisposed within the cylinder and dividing the cylinder into a firstchamber in communication with the first port and a second chamber incommunication with the second port; a dowel pin securely attached to thepiston; an adjusting device regulating the position of the piston alonga position perpendicular to the first and second directions; and asupplying device directing compressed air to the first chamber throughthe first port, or directing the compressed air to the second chamberthrough the second port so as to push the piston and the dowel pin tomove along the first direction so as for performing locking andunlocking the equipment.
 10. The safety pin as recited in claim 9,characterized in that the first direction is a horizontal direction, andthe second direction is a vertical direction.
 11. The safety pin asrecited in claim 10, characterized in that the adjusting deviceincluding a platform, a pulling device and a driving device, wherein thecylinder is installed onto the platform, wherein the pulling device isinterlinked to the platform and the driving device, wherein the positionof the platform can be readily along the second direction by the drivingdevice through the pulling device.
 12. The safety pin as recited inclaim 11, characterized in that the adjusting device further includes aguiderail system which is arranged along the second direction, whereinthe platform is driven to move along the second direction along theguiderail system.
 13. The safety pin as recited in claim 11,characterized in that the driving device is a motor, and the pullingdevice is a cable.
 14. The safety pin as recited in claim 11,characterized in that the safety pin further comprises a switching valveinstalled on the platform, and which includes a third port incommunication with the first port, and a fourth port in communicationwith the second port, an inlet and an outlet, wherein the inlet isinterconnected to the supplying device, and the switching valveselectively interconnect the third port and the forth port to the inletand the outlet, respectively.
 15. The safety pin as recited in claim 14,wherein the switching valve interconnects the third port to the inlet,and the fourth port to the outlet under the first situation, andinterconnects the third port to the outlet and the fourth port to theinlet under the second situation.
 16. The safety pin as recited in claim15, characterized in that the pin further includes a bracket to supportthe dowel pin, the safety pin projects out of the bracket under thefirst situation so as to lockup the equipment.
 17. The safety pin asrecited in claim 6, wherein the safety pin retracts into of the bracketunder the second situation so as to unlock the equipment.
 18. The safetypin as recited in claim 17, wherein the bracket is defined with aplurality of through holes along the second direction, wherein the dowelpin moveably disposed within the thorough hole under the firstsituation, and the dowel pin is out of the hole under the secondsituation.